I would need a solution as well. Since upgrade from Windows Server 2012 to Windows Server 2012 R2 the original Intel NIC drivers have been replaced through the Windows on-board drivers. Since then no Teaming is possible anymore and the system's responsiveness is very bad. Everything is opening slow. When trying to install the latest network driver package 19.1 the system just shows there would not be any Intel NIC in the system!
Could you please publish a driver package where Intel NIC 82575EB will be supported for Wondows Server 2012 R2 / Windows 8.1?
I am looking forward hearing from you.